This is what I used: "When the two capacitors are connected with like plates together (a parallel connection), the two top plates are at one node and the two bottom plates at the other node, so they must share the same final potential difference (Vf). Charge thus flows from the higher-potential capacitor (C1) to the lower-potential capacitor (C2) until their voltages are equal." Why must the two capacitors share the same final Vf if they are in a parallel connection